CPV code 90521000 designates Radioactive waste treatment services in the Common Procurement Vocabulary (CPV 2008), the EU classification used to describe the subject of public contracts.
90521000 sits under 90520000 (Radioactive-, toxic-, medical- and hazardous waste services) and groups 5 more specific sub-codes. When classifying a tender, choose the narrowest code that still covers the full subject of the contract.